Erabbits


The dry weight of the eye lens was measured for 71 free-living wild rabbits of known age. Eye lens weight tends to vary much less
with environmental conditions than does total body weight, and therefore may be a much better indicator of age.

Set of tools to fit a semi-parametric regression model suitable for analysis of data sets in which the response variable is continuous, strictly positive, asymmetric and possibly, censored. Under this setup, both the median and the skewness of the response variable distribution are explicitly modeled by using semi-parametric functions, whose non-parametric components may be approximated by natural cubic splines or P-splines. Supported distributions for the model error include log-normal, log-Student-t, log-power-exponential, log-hyperbolic, log-contaminated-normal, log-slash, Birnbaum-Saunders and Birnbaum-Saunders-t distributions.

Luis Vanegas

ssym

Fitting Semi-Parametric log-Symmetric Regression Models

Erabbits function

A data frame with 71 observations on the following 2 variables.
  <dl> </dl> 

Erabbits: Age and Eye Lens Weight of Rabbits in Australia

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